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选用四种不同纳米无机抗菌纤维,分别放入蒸馏水中,在不同的温度、时间和浸泡次数下,研究浸泡温度、时间以及次数与抗菌纤维浸泡液的电导率之间的关系。实验发现,抗菌纤维浸泡液的电导率与纤维耐反复洗涤性能即抗菌耐久性密切相关。 相似文献
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综述了抗菌塑料抗菌性能的检测方法及其对抗菌材料的评价,并介绍了抗菌塑料制品的应用研究新动向。 相似文献
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抗菌改性涤纶纤维的性能研究 总被引:3,自引:0,他引:3
对抗菌剂的选择、抗菌PET共混体系的熔融与结晶性能及纤维的抗菌性能进行了系统研究,考察了抗菌PET纤维对金黄色葡萄球菌、绿脓杆菌、大肠杆菌和枯草杆菌的抗菌作用,效果良好。 相似文献
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远红外腈纶性能的研究 总被引:1,自引:0,他引:1
对于NaSCN一步法腈纶湿法生产,探讨了采用共混纺丝法研制远红外腈纶纤维,研究了该远红外纤维及其织物的物理-机械性能,远红外发射性能,保温性能,耐洗涤性能和抗菌性能。 相似文献
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选用高效、热稳定良好的有机类抗菌剂(KJ-1)与纤维级聚丙烯(PP)粉料混炼挤出,制备非织造布用抗菌PP树脂及抗菌PP纤维,研究了抗菌剂及其添加量对PP抗菌性能、力学性能及加工性能的影响,并对非织造布用抗菌PP纤维的抗菌性能和力学性能进行表征。结果表明:抗菌剂KJ-1分解温度为260℃,可满足与PP混炼挤出加工要求;添加KJ-1质量分数为0.02%时,抗菌PP树脂对大肠杆菌和金黄色葡萄球菌的抗菌率均大于99%,灰分质量分数为0.019%,230℃时其加工性能与纯PP树脂非常接近;添加KJ-1质量分数0.02%制备2.22 dtex×40 mm非织造布用抗菌PP纤维,纺丝过程中工艺参数波动较小,喷丝板使用时间为22.8 h,纤维断裂强度为1.9 cN/dtex,断裂伸长率为325.4%,对大肠杆菌和金黄色葡萄球菌的抗菌率均大于99%,抗菌长效性达250 d以上。 相似文献
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Aluminum specimens were anodized in a sulfuric acid bath, then silver was electrodeposited in pores of the anodized aluminum by using alternating current . The anodized aluminum with deposited silver was testedfor its antibacterial performance. The results show that the antibacterial rates of the specimens are above 95% against the growth of E. coil, P. aeruginasa, S. faecalis and S. aurens. The morphology of the silver in pores of anodized aluminum is characterized by transmission electron microscopy, and the micrographs indicate that silver is assembled in the form of nanowires with a diameter of 10 nm or 25 nm. The nanowires have a structure of parallel bright stripes alternating with parallel dark stripes. 相似文献
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标题化合物是从Metrodorea stipularis树枝中提取出来的,此化合物具有抗南美洲锥虫病、抗疟疾、抗肿瘤等药理作用。以廉价的2,4,6-三羟基苯乙酮、4-羟基苯甲醛为原料,经吡喃环化、苄基保护酚羟基、羟醛缩合和Pd-C/H2还原不饱和双键及脱保护基,完成天然产物1-(5,7-二羟基-2,2-二甲基苯并吡喃)-3-(2,2-二甲基苯并吡喃)双氢查尔酮的全合成。所有新化合物的结构均经过NMR、IR、HR-MS确认。初步生物活性实验结果表明,1-(5,7-二羟基-2,2-二甲基苯并吡喃)-3-(2,2-二甲基苯并吡喃)双氢查尔酮对大肠杆菌的最小抑菌浓度为32μg/mL。 相似文献
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The soluble and antibacterial chitosan derivative was prepared on the basis of the regioselective chemical modification. The N‐(2‐phthaloylation) chitosan was obtained via the reaction of chitosan with phthalic anhydride in N,N‐dimethylformamide (DMF) at 130°C, and O‐(3,6‐hydroxyethyl) chitosan was produced using chlorohydrins as grafting agent and hydrazine hydrate as reductant. The structure of hydroxyethyl chitosan (HC) was characterized by X‐ray diffraction (XRD), Fourier Transform infrared spectroscopy (FTIR), and gel permeation chromatography (GPC) respectively. The solubility, anticoagulation, and antibacterial property were assessed separately. The result shows that amine I of chitosan is replaced and the amide II disappears during chemical modification, and the functional groups of C6‐OH and ‐NH2 are also reacted. The water‐solubility of the novel chitosan derivative was enhanced relatively; it could even slightly soluble in methanol. The results of platelet adhesion and the activated partial thromboplastin times (APTTs) indicate that grafting hydroxyethyl could improve anticoagulation of chitosan. The antibacterial activity of HC against Enterococcus and E. coli had been much better owing to enhancing the degree of protonation. © 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2012 相似文献
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Aluminum specimens were anodized in a sulfuric acid bath, then silver was electrodeposited in pores of the anodized aluminum by using alternating current . The anodized aluminum with deposited silver was tested for its antibacterial performance. The results show that the antibacterial rates of the specimens are above 95% against the growth of E. coli, P. aeruginasa, S. faecalis and S. aureus. The morphology of the silver in pores of anodized aluminum is characterized by transmission electron microscopy, and the micrographs indicate that silver is assembled in the form of nanowires with a diameter of 10 nm or 25 nm. The nanowires have a structure of parallel bright stripes alternating with parallel dark stripes. 相似文献
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以零VOC弹性乳液为成膜物,硅藻土为主要填料,定型相变储能材料为功能填料,配用负离子抗菌添加剂、抗裂剂、多种助剂,制备成调温调湿抗菌净味柔性腻子。该腻子具有保温隔热、调温控温、吸湿放湿、抗菌防霉、释放负离子、清新空气等功能。 相似文献
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以壳低聚糖与氯乙酰氯反应制备出中间产物2-氯乙酰壳低聚糖,中间产物再与吡唑反应得到2-吡唑酰壳低聚糖。通过FT-IR、1H-NMR、热重分析、溶解度实验对产物进行了结构和性能表征,并测定了产物对褐腐病菌和灰霉病菌的抑菌活性。结果表明:目标产物结构正确,热稳定性略低于壳低聚糖;在水中的溶解度为3 mg·m L-1;抑菌研究表明,产物的抑菌活性随浓度的增大而增大,对褐腐病菌菌丝生长抑制的IC50值为0.33 mg·m L-1,对灰霉病菌菌丝生长抑制的IC50为0.45 mg·m L-1,抑菌活性优于壳低聚糖。 相似文献
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为了改善头孢曲松钠的流动性和比容,优化头孢曲松钠的结晶工艺。将头孢曲松钠粗品加入注射用水中溶解,再加一定量的丙酮稀释,并控制水浴温度为10~15℃,加入适量的活性炭脱色30 min,过滤,用丙酮水混合液洗涤炭饼,溶解液再经0.22μm膜滤后移入四口烧瓶中,加入适量晶种,滴加丙酮结晶,完成后过滤、洗涤、干燥。通过考察头孢曲松钠结晶工艺中的晶种加量、搅拌速度、流加速度和结晶温度4个因素对产品比容及流动性的影响,得出结论:当晶种加量0.3%、搅拌速度为170 r/min、流加速度为2 mL/min、结晶温度为10~15℃时,得到的产品比容小,流动性好。 相似文献
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羟丙基壳聚糖微球的制备与性能 总被引:2,自引:1,他引:2
以壳聚糖、环氧丙烷为原料合成羟丙基壳聚糖,以此为壳材,以胰岛素为芯材,制备微球,并考察微球的性能.单凝聚法制备微球.通过IR、XRD和DSC表征微球的化学结构,采用光学显微镜和扫描电镜观察微球的形貌,并考察微球稳定性.搅拌速度为400 r/min、交联荆用量为0.15 mL、HPCS浓度为8%,得到的微球形状规整,包埋率为63%,粒径大小适中,分布范围窄;各种环境下稳定性合适.羟丙基壳聚糖包覆胰岛素微球各种性能研究表明:此载药微球满足药用需要. 相似文献